/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/MoviePipelineBlueprintLibrary.h
If version number is manually specified by the Job, returns that. Otherwise search the Output Directory for the highest version already existing (and increment it by one if bGetNextVersion is true).
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Movie Render Pipeline") static int32 ResolveVersionNumber ( [FMoviePipelineFilenameResolveParams](API\Plugins\MovieRenderPipelineCore\FMoviePipelineFilenameResolvePar-) InParams, bool bGetNextVersion )